I read this thread when I first got my iPhone.
At that time I had it 'jailbroken' to 1.1.2
I was in no hurry to get the phone working, as I was too busy playing with the " iPod Touch w/ Camera " I had!
This morning I received my I3GSIM and am excited to say, it works and installing it was " so easy a caveman could so it "
I am extremely particular about what I buy and how I use it.
Now some told me to " just cut off a piece of your SIM so the I3GSIM fits over it. "
Well I wanted more precision, so I measured out exactly where the chip was and used a Deremel Tool cutoff wheel to " carve out " the area on the T-Mobile SIM where the chip would poke through.
Put the two pieces together, shoved them in the phone and IT WORKS !!!!!!
NOTE: My son had his JB 1.1.2 phone done with another module. He went to a place and watched as they did it. They had to try 3 different pieces to get one to work.
At least he was there in person, and did not have to worry about mailing it back and forth 3 times.
I am extremely happy with the I3GSIM, sorry I did not take pics, but when you get the piece it is soooo obvious how easy it will go.
NEXT STEP: take it up to 1.1.3